发明名称 |
Fresnel lens for use with rear projection display |
摘要 |
The ultra-thin rear projection display device described herein includes a wide angle lens system and one or more planar mirrors that are parallel to a screen on which an image is to be displayed. In one embodiment, the screen that has multiple groove angles to provide better illumination than screens with a single groove angle.
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申请公布号 |
US6804055(B2) |
申请公布日期 |
2004.10.12 |
申请号 |
US20030640156 |
申请日期 |
2003.08.12 |
申请人 |
INFOCUS CORPORATION |
发明人 |
PETERSON MARK DAVID;GOHMAN JEFFREY ALAN |
分类号 |
G03B21/06;(IPC1-7):G03B21/60 |
主分类号 |
G03B21/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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